Some patients of esophageal cancer do not have obvious clinical symptoms at the early stage, and some of them may have clinical symptoms such as choking sensation in swallowing food and pain behind the sternum. 1. Sense of choking on swallowed food: early esophageal cancer patients may have slow passage of food through esophagus, accompanied by stagnation and foreign body sensation when eating steamed buns, biscuits, etc. This symptom will aggravate progressively. This symptom will be aggravated progressively. 2. Poststernal pain: during the period of illness, there may be burning, pinprick itching or pulling and rubbing pain behind the sternum. Once the above symptoms appear, one should go to the hospital as soon as possible for barium esophagography, gastroscopy and other related examinations to find out whether one is suffering from esophageal cancer or not, and actively cooperate with doctors to receive treatment according to one’s condition.